function validateKey(msg)
{
 if ( (event.shiftKey && (event.keyCode == '45'))
   || (event.ctrlKey && (event.keyCode == '86')) )
 {
  alert(msg);
  return false;
 }
 return true;
}

function clickIE4()
{
 if (event.button == 2)
 {
  return false;
 }
}

function clickNS4(e)
{
 if (document.layers || document.getElementById && !document.all)
 {
  if (e.which == 2 || e.which == 3)
  {
   return false;
  }
 }
}

if (document.layers)
{
 document.captureEvents(Event.MOUSEDOWN);
 document.onmousedown = clickNS4;
}
else if (document.all && !document.getElementById)
{
 document.onmousedown = clickIE4;
}

document.oncontextmenu = new Function("return false");